Motor weight is key. If you are using a tiller you need to find the lightest motor which will do the job. 2 strokes are alot lighter than 4 strokes. A 15hp 2 stroke will work just fine to get you around but a 25hp will plane your boat out much better with two adults on board.
If you go with a 4stroke I would suggest a 15hp. No larger, No smaller.
Glenn
A former Gheenoe Classic owner w/ a 25hp 2stroke Mercury prop that was later converted to a 25/20 jet. Been there, done that, got the tee shirt.
